626 



REPORT 1863. 



As would be expected, the bulk of these species (203 out of 367) are the 

 same as have been already enumerated in the Reigen Catalogue. Of thoso 

 which do not appear in the Mazatlan lists, no fewer than 37 appear in the 

 Panama collections (beside 10 others, known to inhabit the equatorial region). 

 Of those not quoted from Mazatlan, 34 are also found in the Acapulco 

 region, and 30 at La Paz. Of the whole number, 79 have also been found 

 in South America, and 28 in the Galapagos. 38 have also been found in 

 Margarita Bay, of which Pijrazus incisus and Siplionaria cequilirata are Lower 

 Californian rather than Gulf species ; but only 13 belong to that portion of 

 the Lower Californian fauna which is known to reach S. Diego, exclusive of 

 the same number of Gulf species, which also stray into the S. Diegan district. 

 There are also 10 species, which (with more or less distinctness) represent 

 "West Indian forms. Of these, five, viz. Heterodonax bimaculatus, Erato 

 Mauyerice, Volvarina varia, Persicula imbricata and plirygia, are new to the 

 Gulf fauna : the other five appear in the Reigen Catalogue. 



106. The most extensive collections in the Vancouver district, both as far 

 as the number of species and of specimens is concerned, have been made for 

 the Smithsonian Institution by Mr. J. G. Swan, teacher at the Indian Reserve, 

 Neeah Bay, "W. T. For several years * valuable consignments have been 

 received from him of shells collected at Cape Flattery, Port Townsend, and 

 other stations. Latterly he has trained the native children to pick up shore- 

 shells in large quantities. The labour of sorting and arranging these has 

 been enormous; it has, however, been repaid not only by observing the 



* In consequence of boxes having been received at different times, through the accidents 

 of transit, it has not always been possible to ascertain with certainty to whom, among 

 simultaneous collectors, should be allowed priority in the discovery of new species. 



112 



